diff options
Diffstat (limited to 'qemu/roms/seabios/src/kbd.c')
| -rw-r--r-- | qemu/roms/seabios/src/kbd.c | 576 |
1 files changed, 576 insertions, 0 deletions
diff --git a/qemu/roms/seabios/src/kbd.c b/qemu/roms/seabios/src/kbd.c new file mode 100644 index 000000000..a5a1ad9a5 --- /dev/null +++ b/qemu/roms/seabios/src/kbd.c @@ -0,0 +1,576 @@ +// 16bit code to handle keyboard requests. +// +// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> +// Copyright (C) 2002 MandrakeSoft S.A. +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#include "biosvar.h" // GET_BDA +#include "bregs.h" // struct bregs +#include "config.h" // CONFIG_* +#include "hw/ps2port.h" // ps2_kbd_command +#include "hw/usb-hid.h" // usb_kbd_command +#include "output.h" // debug_enter +#include "stacks.h" // yield +#include "string.h" // memset +#include "util.h" // kbd_init + +// Bit definitions for BDA kbd_flag[012] +#define KF0_RSHIFT (1<<0) +#define KF0_LSHIFT (1<<1) +#define KF0_CTRLACTIVE (1<<2) +#define KF0_ALTACTIVE (1<<3) +#define KF0_SCROLLACTIVE (1<<4) +#define KF0_NUMACTIVE (1<<5) +#define KF0_CAPSACTIVE (1<<6) + +#define KF1_LCTRL (1<<0) +#define KF1_LALT (1<<1) +#define KF1_PAUSEACTIVE (1<<3) +#define KF1_SCROLL (1<<4) +#define KF1_NUM (1<<5) +#define KF1_CAPS (1<<6) + +#define KF2_LAST_E1 (1<<0) +#define KF2_LAST_E0 (1<<1) +#define KF2_RCTRL (1<<2) +#define KF2_RALT (1<<3) +#define KF2_101KBD (1<<4) + +void +kbd_init(void) +{ + dprintf(3, "init keyboard\n"); + u16 x = offsetof(struct bios_data_area_s, kbd_buf); + SET_BDA(kbd_flag2, KF2_101KBD); + SET_BDA(kbd_buf_head, x); + SET_BDA(kbd_buf_tail, x); + SET_BDA(kbd_buf_start_offset, x); + + SET_BDA(kbd_buf_end_offset + , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf)); +} + +static u8 +enqueue_key(u8 scan_code, u8 ascii_code) +{ + u16 buffer_start = GET_BDA(kbd_buf_start_offset); + u16 buffer_end = GET_BDA(kbd_buf_end_offset); + + u16 buffer_head = GET_BDA(kbd_buf_head); + u16 buffer_tail = GET_BDA(kbd_buf_tail); + + u16 temp_tail = buffer_tail; + buffer_tail += 2; + if (buffer_tail >= buffer_end) + buffer_tail = buffer_start; + + if (buffer_tail == buffer_head) + return 0; + + SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0), ascii_code); + SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+1), scan_code); + SET_BDA(kbd_buf_tail, buffer_tail); + return 1; +} + +static void +dequeue_key(struct bregs *regs, int incr, int extended) +{ + yield(); + u16 buffer_head; + u16 buffer_tail; + for (;;) { + buffer_head = GET_BDA(kbd_buf_head); + buffer_tail = GET_BDA(kbd_buf_tail); + + if (buffer_head != buffer_tail) + break; + if (!incr) { + regs->flags |= F_ZF; + return; + } + yield_toirq(); + } + + u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0)); + u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1)); + if ((ascii_code == 0xF0 && scan_code != 0) + || (ascii_code == 0xE0 && !extended)) + ascii_code = 0; + regs->ax = (scan_code << 8) | ascii_code; + + if (!incr) { + regs->flags &= ~F_ZF; + return; + } + u16 buffer_start = GET_BDA(kbd_buf_start_offset); + u16 buffer_end = GET_BDA(kbd_buf_end_offset); + + buffer_head += 2; + if (buffer_head >= buffer_end) + buffer_head = buffer_start; + SET_BDA(kbd_buf_head, buffer_head); +} + +static int +kbd_command(int command, u8 *param) +{ + if (usb_kbd_active()) + return usb_kbd_command(command, param); + return ps2_kbd_command(command, param); +} + +// read keyboard input +static void +handle_1600(struct bregs *regs) +{ + dequeue_key(regs, 1, 0); +} + +// check keyboard status +static void +handle_1601(struct bregs *regs) +{ + dequeue_key(regs, 0, 0); +} + +// get shift flag status +static void +handle_1602(struct bregs *regs) +{ + yield(); + regs->al = GET_BDA(kbd_flag0); +} + +// store key-stroke into buffer +static void +handle_1605(struct bregs *regs) +{ + regs->al = !enqueue_key(regs->ch, regs->cl); +} + +// GET KEYBOARD FUNCTIONALITY +static void +handle_1609(struct bregs *regs) +{ + // bit Bochs Description + // 7 0 reserved + // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support) + // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support) + // 4 1 INT 16/AH=0Ah supported + // 3 0 INT 16/AX=0306h supported + // 2 0 INT 16/AX=0305h supported + // 1 0 INT 16/AX=0304h supported + // 0 0 INT 16/AX=0300h supported + // + regs->al = 0x30; +} + +// GET KEYBOARD ID +static void noinline +handle_160a(struct bregs *regs) +{ + u8 param[2]; + int ret = kbd_command(ATKBD_CMD_GETID, param); + if (ret) { + regs->bx = 0; + return; + } + regs->bx = (param[1] << 8) | param[0]; +} + +// read MF-II keyboard input +static void +handle_1610(struct bregs *regs) +{ + dequeue_key(regs, 1, 1); +} + +// check MF-II keyboard status +static void +handle_1611(struct bregs *regs) +{ + dequeue_key(regs, 0, 1); +} + +// get extended keyboard status +static void +handle_1612(struct bregs *regs) +{ + yield(); + regs->al = GET_BDA(kbd_flag0); + regs->ah = ((GET_BDA(kbd_flag1) & ~(KF2_RCTRL|KF2_RALT)) + | (GET_BDA(kbd_flag2) & (KF2_RCTRL|KF2_RALT))); + //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX); +} + +static void +handle_166f(struct bregs *regs) +{ + if (regs->al == 0x08) + // unsupported, aka normal keyboard + regs->ah = 2; +} + +// keyboard capability check called by DOS 5.0+ keyb +static void +handle_1692(struct bregs *regs) +{ + // function int16 ah=0x10-0x12 supported + regs->ah = 0x80; +} + +// 122 keys capability check called by DOS 5.0+ keyb +static void +handle_16a2(struct bregs *regs) +{ + // don't change AH : function int16 ah=0x20-0x22 NOT supported +} + +static void +handle_16XX(struct bregs *regs) +{ + warn_unimplemented(regs); +} + +static void noinline +set_leds(void) +{ + u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07; + u8 kbd_led = GET_BDA(kbd_led); + u8 led_flags = kbd_led & 0x07; + if (shift_flags == led_flags) + return; + + int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags); + if (ret) + // Error + return; + kbd_led = (kbd_led & ~0x07) | shift_flags; + SET_BDA(kbd_led, kbd_led); +} + +// INT 16h Keyboard Service Entry Point +void VISIBLE16 +handle_16(struct bregs *regs) +{ + debug_enter(regs, DEBUG_HDL_16); + if (! CONFIG_KEYBOARD) + return; + + // XXX - set_leds should be called from irq handler + set_leds(); + + switch (regs->ah) { + case 0x00: handle_1600(regs); break; + case 0x01: handle_1601(regs); break; + case 0x02: handle_1602(regs); break; + case 0x05: handle_1605(regs); break; + case 0x09: handle_1609(regs); break; + case 0x0a: handle_160a(regs); break; + case 0x10: handle_1610(regs); break; + case 0x11: handle_1611(regs); break; + case 0x12: handle_1612(regs); break; + case 0x92: handle_1692(regs); break; + case 0xa2: handle_16a2(regs); break; + case 0x6f: handle_166f(regs); break; + default: handle_16XX(regs); break; + } +} + +#define none 0 +#define MNUM KF0_NUMACTIVE +#define MCAP KF0_CAPSACTIVE + +static struct scaninfo { + u16 normal; + u16 shift; + u16 control; + u16 alt; + u8 lock_flags; +} scan_to_scanascii[] VAR16 = { + { none, none, none, none, none }, + { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */ + { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */ + { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */ + { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */ + { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */ + { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */ + { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */ + { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */ + { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */ + { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */ + { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */ + { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */ + { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */ + { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */ + { 0x0f09, 0x0f00, none, none, none }, /* tab */ + { 0x1071, 0x1051, 0x1011, 0x1000, MCAP }, /* Q */ + { 0x1177, 0x1157, 0x1117, 0x1100, MCAP }, /* W */ + { 0x1265, 0x1245, 0x1205, 0x1200, MCAP }, /* E */ + { 0x1372, 0x1352, 0x1312, 0x1300, MCAP }, /* R */ + { 0x1474, 0x1454, 0x1414, 0x1400, MCAP }, /* T */ + { 0x1579, 0x1559, 0x1519, 0x1500, MCAP }, /* Y */ + { 0x1675, 0x1655, 0x1615, 0x1600, MCAP }, /* U */ + { 0x1769, 0x1749, 0x1709, 0x1700, MCAP }, /* I */ + { 0x186f, 0x184f, 0x180f, 0x1800, MCAP }, /* O */ + { 0x1970, 0x1950, 0x1910, 0x1900, MCAP }, /* P */ + { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */ + { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */ + { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */ + { none, none, none, none, none }, /* L Ctrl */ + { 0x1e61, 0x1e41, 0x1e01, 0x1e00, MCAP }, /* A */ + { 0x1f73, 0x1f53, 0x1f13, 0x1f00, MCAP }, /* S */ + { 0x2064, 0x2044, 0x2004, 0x2000, MCAP }, /* D */ + { 0x2166, 0x2146, 0x2106, 0x2100, MCAP }, /* F */ + { 0x2267, 0x2247, 0x2207, 0x2200, MCAP }, /* G */ + { 0x2368, 0x2348, 0x2308, 0x2300, MCAP }, /* H */ + { 0x246a, 0x244a, 0x240a, 0x2400, MCAP }, /* J */ + { 0x256b, 0x254b, 0x250b, 0x2500, MCAP }, /* K */ + { 0x266c, 0x264c, 0x260c, 0x2600, MCAP }, /* L */ + { 0x273b, 0x273a, none, none, none }, /* ;: */ + { 0x2827, 0x2822, none, none, none }, /* '" */ + { 0x2960, 0x297e, none, none, none }, /* `~ */ + { none, none, none, none, none }, /* L shift */ + { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */ + { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, MCAP }, /* Z */ + { 0x2d78, 0x2d58, 0x2d18, 0x2d00, MCAP }, /* X */ + { 0x2e63, 0x2e43, 0x2e03, 0x2e00, MCAP }, /* C */ + { 0x2f76, 0x2f56, 0x2f16, 0x2f00, MCAP }, /* V */ + { 0x3062, 0x3042, 0x3002, 0x3000, MCAP }, /* B */ + { 0x316e, 0x314e, 0x310e, 0x3100, MCAP }, /* N */ + { 0x326d, 0x324d, 0x320d, 0x3200, MCAP }, /* M */ + { 0x332c, 0x333c, none, none, none }, /* ,< */ + { 0x342e, 0x343e, none, none, none }, /* .> */ + { 0x352f, 0x353f, none, none, none }, /* /? */ + { none, none, none, none, none }, /* R Shift */ + { 0x372a, 0x372a, none, none, none }, /* * */ + { none, none, none, none, none }, /* L Alt */ + { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */ + { none, none, none, none, none }, /* caps lock */ + { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */ + { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */ + { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */ + { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */ + { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */ + { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */ + { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */ + { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */ + { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */ + { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */ + { none, none, none, none, none }, /* Num Lock */ + { none, none, none, none, none }, /* Scroll Lock */ + { 0x4700, 0x4737, 0x7700, none, MNUM }, /* 7 Home */ + { 0x4800, 0x4838, none, none, MNUM }, /* 8 UP */ + { 0x4900, 0x4939, 0x8400, none, MNUM }, /* 9 PgUp */ + { 0x4a2d, 0x4a2d, none, none, none }, /* - */ + { 0x4b00, 0x4b34, 0x7300, none, MNUM }, /* 4 Left */ + { 0x4c00, 0x4c35, none, none, MNUM }, /* 5 */ + { 0x4d00, 0x4d36, 0x7400, none, MNUM }, /* 6 Right */ + { 0x4e2b, 0x4e2b, none, none, none }, /* + */ + { 0x4f00, 0x4f31, 0x7500, none, MNUM }, /* 1 End */ + { 0x5000, 0x5032, none, none, MNUM }, /* 2 Down */ + { 0x5100, 0x5133, 0x7600, none, MNUM }, /* 3 PgDn */ + { 0x5200, 0x5230, none, none, MNUM }, /* 0 Ins */ + { 0x5300, 0x532e, none, none, MNUM }, /* Del */ + { none, none, none, none, none }, + { none, none, none, none, none }, + { 0x565c, 0x567c, none, none, none }, /* \| */ + { 0x8500, 0x8700, 0x8900, 0x8b00, none }, /* F11 */ + { 0x8600, 0x8800, 0x8a00, 0x8c00, none }, /* F12 */ +}; + +// Handle a ps2 style scancode read from the keyboard. +static void +__process_key(u8 scancode) +{ + u8 flags0 = GET_BDA(kbd_flag0); + u8 flags1 = GET_BDA(kbd_flag1); + u8 flags2 = GET_BDA(kbd_flag2); + + if (flags2 & KF2_LAST_E1) { + // Part of "pause" key (sequence is e1 1d 45 e1 9d c5) + if ((scancode & ~0x80) == 0x1d) + // Second key of sequence + return; + // Third key of sequence - clear flag. + flags2 &= ~KF2_LAST_E1; + SET_BDA(kbd_flag2, flags2); + + if (scancode == 0xc5) { + // Final key in sequence. + + // XXX - do actual pause. + } + return; + } + + // XXX - PrtScr should cause int 0x05 + // XXX - Ctrl+Break should cause int 0x1B + // XXX - SysReq should cause int 0x15/0x85 + + switch (scancode) { + case 0x00: + dprintf(1, "KBD: int09 handler: AL=0\n"); + return; + + case 0x3a: /* Caps Lock press */ + flags0 ^= KF0_CAPSACTIVE; + flags1 |= KF1_CAPS; + break; + case 0xba: /* Caps Lock release */ + flags1 &= ~KF1_CAPS; + break; + + case 0x2a: /* L Shift press */ + flags0 |= KF0_LSHIFT; + break; + case 0xaa: /* L Shift release */ + flags0 &= ~KF0_LSHIFT; + break; + + case 0x36: /* R Shift press */ + flags0 |= KF0_RSHIFT; + break; + case 0xb6: /* R Shift release */ + flags0 &= ~KF0_RSHIFT; + break; + + case 0x1d: /* Ctrl press */ + flags0 |= KF0_CTRLACTIVE; + if (flags2 & KF2_LAST_E0) + flags2 |= KF2_RCTRL; + else + flags1 |= KF1_LCTRL; + break; + case 0x9d: /* Ctrl release */ + flags0 &= ~KF0_CTRLACTIVE; + if (flags2 & KF2_LAST_E0) + flags2 &= ~KF2_RCTRL; + else + flags1 &= ~KF1_LCTRL; + break; + + case 0x38: /* Alt press */ + flags0 |= KF0_ALTACTIVE; + if (flags2 & KF2_LAST_E0) + flags2 |= KF2_RALT; + else + flags1 |= KF1_LALT; + break; + case 0xb8: /* Alt release */ + flags0 &= ~KF0_ALTACTIVE; + if (flags2 & KF2_LAST_E0) + flags2 &= ~KF2_RALT; + else + flags1 &= ~KF1_LALT; + break; + + case 0x45: /* Num Lock press */ + flags1 |= KF1_NUM; + flags0 ^= KF0_NUMACTIVE; + break; + case 0xc5: /* Num Lock release */ + flags1 &= ~KF1_NUM; + break; + + case 0x46: /* Scroll Lock press */ + flags1 |= KF1_SCROLL; + flags0 ^= KF0_SCROLLACTIVE; + break; + case 0xc6: /* Scroll Lock release */ + flags1 &= ~KF1_SCROLL; + break; + + case 0xe0: + // Extended key + flags2 |= KF2_LAST_E0; + SET_BDA(kbd_flag2, flags2); + return; + case 0xe1: + // Start of pause key sequence + flags2 |= KF2_LAST_E1; + break; + + default: + if (scancode & 0x80) + // toss key releases + break; + if (scancode == 0x53 + && ((flags0 & (KF0_CTRLACTIVE|KF0_ALTACTIVE)) + == (KF0_CTRLACTIVE|KF0_ALTACTIVE))) { + // Ctrl+alt+del - reset machine. + SET_BDA(soft_reset_flag, 0x1234); + reset(); + } + if (scancode >= ARRAY_SIZE(scan_to_scanascii)) { + dprintf(1, "KBD: int09h_handler(): unknown scancode read: 0x%02x!\n" + , scancode); + return; + } + u8 asciicode; + struct scaninfo *info = &scan_to_scanascii[scancode]; + if (flags0 & KF0_ALTACTIVE) { + asciicode = GET_GLOBAL(info->alt); + scancode = GET_GLOBAL(info->alt) >> 8; + } else if (flags0 & KF0_CTRLACTIVE) { + asciicode = GET_GLOBAL(info->control); + scancode = GET_GLOBAL(info->control) >> 8; + } else if (flags2 & KF2_LAST_E0 + && scancode >= 0x47 && scancode <= 0x53) { + /* extended keys handling */ + asciicode = 0xe0; + scancode = GET_GLOBAL(info->normal) >> 8; + } else if (flags0 & (KF0_RSHIFT|KF0_LSHIFT)) { + /* check if lock state should be ignored because a SHIFT + * key is pressed */ + + if (flags0 & GET_GLOBAL(info->lock_flags)) { + asciicode = GET_GLOBAL(info->normal); + scancode = GET_GLOBAL(info->normal) >> 8; + } else { + asciicode = GET_GLOBAL(info->shift); + scancode = GET_GLOBAL(info->shift) >> 8; + } + } else { + /* check if lock is on */ + if (flags0 & GET_GLOBAL(info->lock_flags)) { + asciicode = GET_GLOBAL(info->shift); + scancode = GET_GLOBAL(info->shift) >> 8; + } else { + asciicode = GET_GLOBAL(info->normal); + scancode = GET_GLOBAL(info->normal) >> 8; + } + } + if (scancode==0 && asciicode==0) + dprintf(1, "KBD: scancode & asciicode are zero?\n"); + enqueue_key(scancode, asciicode); + break; + } + flags2 &= ~KF2_LAST_E0; + + SET_BDA(kbd_flag0, flags0); + SET_BDA(kbd_flag1, flags1); + SET_BDA(kbd_flag2, flags2); +} + +void +process_key(u8 key) +{ + if (!CONFIG_KEYBOARD) + return; + + if (CONFIG_KBD_CALL_INT15_4F) { + // allow for keyboard intercept + struct bregs br; + memset(&br, 0, sizeof(br)); + br.eax = (0x4f << 8) | key; + br.flags = F_IF|F_CF; + call16_int(0x15, &br); + if (!(br.flags & F_CF)) + return; + key = br.eax; + } + __process_key(key); +} |